Alachlor (Lasso)
West Jefferson Waterworks District 2
Alachlor is a widely used agricultural herbicide. It causes cancer in laboratory animals and may be carcinogenic to people.
25
Samples
0
Samples exceeding legal limit (MCL)
0
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | ND | 4 | 0 | ND |
| 2015 | ND | 4 | 0 | ND |
| 2016 | ND | 4 | 0 | ND |
| 2017 | 0.200 ppb | 3 | 1 | ND - 0.400 ppb |
| 2018 | 0.700 ppb | 5 | 1 | 0.500 ppb - 1.000 ppb |
| 2019 | 1.20 ppb | 5 | 1 | ND - 1.80 ppb |
ppb = parts per billion
State and national drinking water standards and health guidelines
EPA Maximum Contaminant
Level (MCL) 2 ppb
The legal limit for alachlor, established in 1991, was based on toxicity studies in laboratory animals conducted in the 1980s.
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2014-02-04 | AD88742 | ND |
| 2014-02-04 | AD88742 | ND |
| 2014-10-22 | AD98839 | ND |
| 2014-10-22 | AD98839 | ND |
| 2015-03-16 | 35179807004 | ND |
| 2015-03-16 | 35179807004 | ND |
| 2015-10-14 | 35212328003 | ND |
| 2015-10-14 | 35212328003 | ND |
| 2016-01-27 | 35226999004 | ND |
| 2016-01-27 | 35226999004 | ND |
| 2016-12-13 | 35283615001 | ND |
| 2016-12-13 | 35283615001 | ND |
| 2017-02-22 | 35296827004 | ND |
| 2017-02-22 | 35296827004 | ND |
| 2017-06-01 | 0.200 ppb* | |
| 2018-04-17 | 35386954005 | ND |
| 2018-04-17 | 35386954005 | ND |
| 2018-06-01 | 0.700 ppb* | |
| 2018-10-02 | 35421760001 | ND |
| 2018-10-02 | 35421760001 | ND |
| 2019-02-05 | 35446731001 | ND |
| 2019-02-05 | 35446731001 | ND |
| 2019-06-01 | 1.20 ppb* | |
| 2019-08-14 | 35490415001 | ND |
| 2019-08-14 | 35490415001 | ND |
* Sample result is taken from the system's CCR report.